User guide

Chapter 4: Making Studio Connections 17
3 If your microphone requires phantom power,
make sure the microphone is connected, then
press the Phantom Power switch (labeled 48V)
on the front of the Mbox Pro. This switch sends
48V to all four mic inputs. The 48V LED on the
front of the Mbox Pro lights when phantom
power is engaged.
4 On the front of the Mbox Pro, turn the master
volume knob to the desired level.
5 On the front of the Mbox Pro, carefully turn the
Gain knob to the right to increase the input level
of your microphone signal.
6 If the incoming signal is too loud, press the
Push/Pull knob to engage the –20 dB pad.
Using a Mic with an XLR
Connector (Input Channels 3–4)
To use a microphone with an XLR connector:
1 Plug your microphone cable into one of the two
Mic inputs (XLR) on the back of Mbox Pro (In
this example, Input 3).
2 There are two Mic inputs (XLR) on the back
panel, (Input 3 and 4). On the front panel, set the
Mic/Line input switch for channel 3 to the “out”
position (microphone).
Phantom Power switch
Gain knob for Input 1 (Master volume knob shown)
Input 2 Pad
48V (Phantom Power)
Master volume knob
G
a
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n
k
no
b
–20 dB Pad
XLR connector plugged into Mic Input 3 (XLR jack)
Use the corresponding back panel inputs
(marked Line Input 3 and Line Input 4) on the
back when working with line-level signals. In
that case, set the Mic/Line input switch for
channel 3 to the “in” position (line).
Mic/Line switches for Mic/DI combo jacks
Mic input 3
Mic/Line switches